Free T4 test cost in Tampa, FL
In Tampa-St. Petersburg-Clearwater, FL, 12 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $7.60 to $279.76, with a median of $252.67. The lowest listed price is at Orlando Health Wiregrass Ranch Hospital and 1 other hospital — $245.07 less than the median here. Across Florida, the median is $70.60 at 81 hospitals.
Cash prices at 12 facilities across 8 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Tampa-St. Petersburg-Clearwater, FL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Orlando Health Wiregrass Ranch Hospital lowest Wesley Chapel, FL Hb Assay Of Free Thyroxine - T4 Free | $7.60 | $19.00 | — | 60% | Apr 1, 2026 source file |
| OHI West lowest Saint Petersburg, FL Hb Assay Of Free Thyroxine - T4 Free | $7.60 | $19.00 | — | 60% | Apr 1, 2026 source file |
| OHI West Saint Petersburg, FL Hb Free Thyroxine-Ref | $18.49 | $46.22 | — | 60% | Apr 1, 2026 source file |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Free Thyroxine-Ref | $18.49 | $46.22 | — | 60% | Apr 1, 2026 source file |
| AdventHealth Dade City Dade City, FL · (352) 568-1100 HC T4 FREE - THYROXINE FREE | $60.89 | $60.89 | — | — | Apr 1, 2026 source file |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb T4 Free | $127.75 | $365.00 | — | 65% | Apr 1, 2026 source file |
| AdventHealth North Pinellas Tarpon Springs, FL · (813) 615-7219 HC T4 FREE - THYROXINE FREE | $215.38 | $215.38 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC T4 FREE BY DIALYSIS - ARUP | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC T4 FREE - THYROXINE FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC T4 FREE BY DIALYSIS - ARUP | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC T4 FREE - THYROXINE FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC T4 FREE BY DIALYSIS - ARUP | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC T4 FREE - THYROXINE FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC T4 FREE BY DIALYSIS - ARUP | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC T4 FREE - THYROXINE FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC T4 FREE BY DIALYSIS - ARUP | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC T4 FREE REFLEX FROM TSH CASCADE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC T4 FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC T4 FREE - THYROXINE FREE | $252.67 | $252.67 | — | — | Apr 1, 2026 source file |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL T4 (THYROXINE) FREE, OUTSIDE FACILITY | $255.50 | $511.00 | $96.58–$511.00 | 50% | — source file |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL ASSAY OF FREE THYROXINE | $255.50 | $511.00 | $96.58–$511.00 | 50% | — source file |
| AdventHealth Connerton Land O Lakes, FL HC T4 FREE BY DIALYSIS - ARUP | $279.76 | $279.76 | — | — | Apr 1, 2026 source file |
| AdventHealth Connerton Land O Lakes, FL HC T4 FREE - THYROXINE FREE | $279.76 | $279.76 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $7.60, median $252.67, highest $279.76 — a 36.8× difference within the same market.
As an inpatient, the same code is billed by 12 facilities here, median $252.67. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
A free T4 test measures thyroxine that is not bound to proteins, the active form of the main thyroid hormone. It is usually ordered with or after a TSH test to check for an underactive or overactive thyroid and to adjust thyroid medicine.
What the price covers
The price usually covers the free T4 test only. The blood draw and the TSH test (84443) are billed separately.